The option that describes the purpose of using headings in text is: to show that a new idea is being introduced.
The correct option is "to show that a new idea is being introduced." Headings are used in text to help organize and structure the content. They act as signposts, indicating when a new topic or idea is being introduced. By using headings, readers can quickly scan through the text and understand its structure, allowing them to locate specific information or sections of interest more easily. So, the purpose of using headings in text is to provide a clear visual hierarchy and guide readers through the content by indicating the start of new ideas or sections.